Disk-sharpening attachment.



No. 660,704.- Patented 0st. 30, I900.

H. H. HUNNICUTT; DISK SHABPENING ATTACHMENT.

(Application 110d 1m. 17, 1900.

( No Model.)

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UNirEo STATES PATENT OFFICE.

HOMER H. HUNNICUTT, OF GILTNER, NEBRASKA.

DlSK-SHARPENING ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 660,704, dated October 30, 1900.

Application filed March 1'7 1900. Seria1No.9,068. (N model.)

To aZZ whom it may concern:

Be it known that I, HOMER H. HUNNIOUTT, a citizen of the United States, residing at Giltnor, in the county of Hamilton and State of Nebraska, have invented a new and useful Disk-Sharpening Attachment, of which the following is a specification.

This invention relates to disk-Sharpeners, and the aim of the present improvement is to provide a simple and effective attachment for grinding-machines whereby a disk can be held in close relation to a grinding element and adjustable in horizontal and vertical directions to accommodate various sizes of disks and irregularities in the disk edges, the vertical movement being automatic to maintain the disk edge in close relation to the grinding element.

The invention consists, primarily,in a frame for removable attachment to a grinding or sharpening mechanism having a vertical spindle, on which a disk-support is movably and loosely mounted to swing in a horizontal plane or rise and fall to accommodate the size of the disk or an irregularity in the disk edge, the weight of the support being brought to bear on the disk to hold the latter closely to the grinding element.

The invention further consists in the details of construction and arrangement of the several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is a perspective view of a grinding mechanism, showing the improved disk-sharpeningattachmentapplied thereto in operative position. Fig. 2 is a similar view of the improved attachment disconnected and shown on a larger scale.

Similar numerals of reference are employed to indicate corresponding parts in the views.

The numeral 1 designates a stand or upright of the grinding-machine, having arms 2 at the upper extremity thereof provided with suitablebearings or journal-boxes, in which is rotatably mounted a shaft 3, having emerywheels 4. attached to opposite terminals thereof and adapted to be driven by a belt in engagement with an intermediate belt 'element 4.

The improved attachment comprises a frame 5, including a clamping-yoke 6, supplied with a securing bolt or pin 7 and having the remaining portion thereof in the form of converged or closely-arranged parallel members 8 to provide an arm 9. The yoke 6 is intended to be removably attached to the stand 1, as shown by Fig. 1, and removably fastened in 0;)- erative position, so that the arm 9 will occupy a horizontal plane relatively to the said stand, the bolt or pin being slightly curved to correspond to the contour of the surface of the stand with which it engages. The frame also includes a diagonal or oblique-twisted brace 10, which has its lower extremity in engagement with a semicircular clampingbar 11, provided with opposite screw-t breaded terminals 12, adjustably extending through outstanding ears 13 of a correlative clampingband 14, to which the said clamping-bar is removably fitted on the stand 1 and serves to maintain the entire frame 5 in its adjusted position on the stand. The upper extremity of the brace passes between the members 8 of the arm 9 and terminates in a horizontal table 15, with an aperture therethrough to receive a pivot-bolt 16, extending through a crank-arm 17, which has a vertical spindle 18 rising from its free extremity. The adjustment of the bolt 16 in relation to the table is such that the arm 17 is free to swing or move in a horizontal plane and is held in a truly horizontal position by bearing on the said table.

The vertical spindle 18 provides a fulcrum or pintle for the operation of a disk support 19, which comprises a lower bar 20, having its one extremity apertu red, as at 22, and loosely mounted on the said spindle and its outer portion 21 slightly elevated through the medium of an intermediate bend 23 and then continued into a substantially vertical member 34, which terminates in a horizontal handle or grip 25. The greater portion of the bar is flat to accommodate the attachment of other parts thereto, as will be presently explained; but the grip or handle 25 is rounded for convenience in grasping the same. The support 19 also includes an auxiliary member 26, having one terminal extended upwardly in a curved member27 and apertured,as at 28, to also fit over the spindle 18 to serve as an additional bearing for the support at a point above the eugagem ent with the said spindle of the terminal of the bar 20. From the outer will ensue.

lower termination of the member 27 an auxiliary member 26 is horizontallyarranged, as at 29, and held apart from the adjacent portion of the bar by a vertically-disposed space-sleeve or an analogous device, and through the horizontal portion 29 of the auxiliary the space-sleeve 30 and the adjacent horizontal part of the bar 20 a bolt 31 is vertically passed to separahlyconnect the parts and hold them in spaced relation through the intermediation of the sleeve 30. From the outer termination of the horizontal part 29 of the auxiliary 26 the latter is continued up rearward in the form of an arcuate extension 32, having an upper horizontal portion 33, the opposite extremity of said extension being secured to the elevated portion 21 of the bar 20, as at 34. The horizontal portion 33 of the arcuate extension 32 and the part of the bar 20 therebelow have a spindle or rod 35, extending vertically therethrough, which is removable and screw-threaded and nutted at its lower extremity, as at 36, and provided with an upper collar37, which bears against the under side of the horizontal portion 33 of the arcuate extension 32 to afford means for rigidly and positively disposing the said rod in position. The extremity of the rod 35 above the horizontal portion 33 of the arcu ate extension is screw-threaded, as at 38, and thereon is movably mounted a bearing-head 39, against which the disk has firm contact and in application is run down over the said screwthreaded extremity 38 and held in place bya nut 4:1,also applied to said extremity,to thereby hold the disk against vertical movement in order to make the grinding operation effective.

It is intended that the frame 5 be applied to any suitable grinding-machine other than that shown, and it is to be understood that the practical operation of the improved attachment is not dependent upon any form of grinding-machine. The form shown, however, is sufficient to illustrate the practical working of the attachment, and after the disk 40 has been arranged as heretofore set forth, and shown by Fig. 1, the support 9 is shifted horizontally to bring the edge of the disk in contact with the adjacent emery-wheel 4. At the time that the support 19 is horizontally shifted it is slightly elevated and the edge of the disk is brought to bear upon the highest portion of the emery-wheel, and thereby the weight of the support efiects the disk and acts to hold the latter firmly down or in contact with the emery-wheel, and as said disk is gradually ground down the said support gravitates automatically and maintains the edge of the disk in firm and regular engagement with the emery-wheel or grinding element. It will therefore be understood that any irregularities in the disk will be compensated for by the automatic gravitation of the support and a regular grinding of the disk In the operation of grinding the disk it will be also understood that the latter is gradually revolved in a horizontal plane by the motion of the grinding element with which it is in contact, and the primary adjustment of the disk will be such as to permit this revolution of the disk without loosening the same 'too much. If the disk should become loose, the grinding operation will regularly proceed in view of the fact that the support 19 will gravitate, and, moreover, at any time that it is desired to shift the support the latter operation can be easily effected by the operator to hold the disk closely to the grinding element or draw it away from the latter for inspection or after the grinding operation is completed.

From the foregoing it will be seen that a regular grinding operation can be pursued irrespective of the irregularity of the edge of the grinding-disk, and in view of the simplicity of the entire attachment the expense of manufacture is reduced to a minimum, and its capability of application to any form of grinding-machine renders it of exceptional value and possessed of superior advantages.

Though the preferred form of the device has been described and illustrated, changes in the form, proportion, size, and minor details may be resorted to without departing from the principle of the invention.

Having thus described the invention, what is claimed as new is 1. In adevice of the character set forth, the combination of an attachable frame, a vertically-disposed spindle rotatabl y mounted on said frame, and a disk-supportautomatically adjustable in a vertical and a horizontal direction on the said spindle and carrying a fixed vertical rod for holding the disk.

2. In a device of the character set forth, the combination with a sharpening-machine having a sharpening element, of a frame having a crank-arm mounted thereon and movable in a horizontal plane and provided with a vertical spindle at its free extremity, and a disk-support shiftable in a horizontal plane and having an automatic vertical movement on the said spindle.

3. In adevice of the character set forth, the combination with asharpening-Inachine, having a rotatable sharpening element, of aframe comprising upper and lower clamping members removably attached to a portion of said machine, a spindle movably mounted on the said frame, a support vertically adjustable on the said spindle and including an arcuate extension and a handle or grip, and a verticallydisposed rod mounted in the said arcuate extension and the portion of the support thereunder and having an upper extremity to receive the disk to be ground, the said support having a vertical gravitating movement on the spindle.

4C. In a device of the character set forth, the combination with a grinding-machine, having a rotatable grinding element, of a frame comprising upper and lower clamping devices,

the upper clamping device having a horizontal arm as a part thereof, a diagonal brace extending from the lower member upwardly through the arm of the upper member and provided with a horizontal table, a crankarm pivotally mounted on the said table and having a vertical spindle at its free end, and a disk-support having portions thereof en gaging the 'said spindle and freely movable in a vertical direction.

5. A disk-grinding attachment comprising a frame and a disk-support, the said disksupport being horizontally shiftable and pivotally mounted on a part of the frame and also automatically adjustable in a vertical direction.

In testimony that I claim the foregoing as my own I have hereto aflixed my signature in the presence of two Witnesses.

HOMER H. HUNNIOUTT. 

